Porn stars and ultimate fighters partied together in Vegas over July Fourth weekend. At Crazy Horse III, UFC fighter Mike Pierce celebrated his win at the MGM Grand. Pierce beat David Mitchell in the brawl. Meanwhile, adult star Nina Mercedez was also at the gentlemen’s club raging with fellow X-rated stars Helen Mei, Nikki Delano, Kiara Mia, Allison Moore and Nyomi Banxxx to celebrate the launch of Mercedez’s new swimwear line, La Scorpia. Joining the babes, who were toasting with Champagne and Grey Goose, was Grammy nominee K-Mac.